Kobold Avenger
Legend
Psionics has always been a form of magic, when magic(k) has been defined as "the science and art of causing change to occur in conformity to will" to quote Aleister Crowley. Then psionics is certainly a subset of that. Even thinking that Psionics != magic, leads to the special snowflake syndrome and justifies the perception that Psionics are imbalance and overpowered cheese (even if it's quite balanced). If Psionics ends up as something where it's immune to Dispel Magic, unaffected by spell resistance and anti-magic fields, then it is without a doubt a justification of those opinions. As many would say something like "why play a wizard anymore, and now I'm going to have to make a bunch of things that have the same type of resistance to that psioniky crap.. Alright, banned!"Well, no. The spellcasting classes in 5E are more different already than in any edition before. They look different and they play different. When you create a 10th level wizard, sorcerer, cleric and warlock, even a bard, you get totally different characters to play. They might share a spell or two, but that is all. Even sorcerer and wizard have never been that different before, which I like.
You don't need to copy any class system to create some nice psionic classes. And I don't want psionics to be just a variant magic class. Psionics are different, they are no form of magic.
I am not from the USA, and I know how many players and gaming groups from my country are. And they're the same as many gamers from the UK or Australia or even elsewhere in countries that don't speak English, and they all roughly share similiar opinions. The country someone is from is not going to change their perceptions on something like D&D.D&D is no USA only game. It will be viewed and played different all over the world anyway.
If you can drop a psionic character into an ongoing campaign that didn't have such characters before and change very little about it, then the designers have done a good job on creating something that's actually usable. If it ends up being like 2e psionics, well then they would have failed in their job at integration.